148176-86-7 Monosodium 6,7-dihydro-6-oxopyrazolo(1,5-a)pyrido(3,4-e)pyrimidine-3-carboxylate Pyrazolo(1,5-a)pyrido(3,4-e)pyrimidine-3-carboxylic acid, 6,7-dihydro-6-oxo-, monosodium salt